Novel slot pattern in bifurcated waveguide for polarisation agile array antenna

Slot radiators in polarisation-selective dual-mode waveguide arrays present an unusual analytical problem since the radiating apertures may be three dimensional. This is the case when a typical slot in the broad wall is shunted by some kind of clearance notch in the centre wall of a dual-mode waveguide. This analysis describes the examination of a longitudinal slot straddling the bifurcation. A moment method formulation is presented